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Tungsten Carbide Bar Drawing Dies

Scope of drawing die is very extensive, mainly for drawing bar, wire rod, wire, pipes and other objects which are straight difficult process, and suitable for drawing steel, copper, tungsten, molybdenum and other metals and alloys. Tungsten carbide bar drawing dies is an essential tool for deformation processing, its shape and structure in order to improve production efficiency and product quality. In the metal products industry, tungsten carbide bar drawing dies related to product quality, die life, production efficiency, energy consumption and costs.ect. Tungsten carbide has a high hardness and stable chemical properties, high abrasion resistance, and it is an ideal alloy bar drawing dies materials.

Drawing die is a very important tool which is easy consumption. Tungsten carbide bar drawing dies material selection plays a key role in drawing dies. Physical and chemical properties of drawing dies must meet high hardness, impact resistance, abrasion resistance, low coefficient of friction requirements. When the drawing dies material and the pullout process are same, the decisive factor is the life drawing die surface hardness of the die itself, that is, high hardness, then abrasion resistance and long service life. Tungsten carbide bar drawing dies surface of the die orifice depositing one or more layers of carbides, nitrides, oxides and other hard refractory compounds, which can greatly improve the performance and service life of the mold.

Hole design requirements of tungsten carbide bar drawing dies
1.Die hole design to be reasonable, can meet the needs of the deformation, and have small drawing force, stable, uniform deformation, wear uniform.
2. Die hole should have the correct cross-sectional shape and precise geometry, ensure products dimensional tolerances meet the requirements.
3. The working part of the die hole has a smooth surface to ensure that the article has a low surface roughness.
4. Tungsten carbide bar drawing dies have enough strength to avoid when pull system and damage due to insufficient strength, or hole size is too large to produce strong deformation.

Comparison of ultra-fine grain tungsten carbide bar drawing dies and ordinary tungsten carbide bar drawing dies
Tungsten carbide particle size is key to improve die life. ordinary tungsten carbide bar drawing dies grain size is 2μm~4μm, and carbide grain size in lμm below (referred to ultra-fine grain tungsten carbide bar drawing dies) as compared with ordinary carbide has the following characteristics: First, cobalt is the same, ultra-fine grain cemented carbide hardness and strength while increasing the cobalt content, while the ordinary carbide is usually hardness, strength decreased; The second is a good high-temperature hardness of ultra-fine grain cemented carbide, for example, 400℃~ 600 ℃, the ordinary type YG6X alloy, hardness is1200HV ~ 1400HV, and ultrafine grain hardness YG6X but in 1500HV-1600HV. Ultra-fine grain tungsten carbide bar drawing dies are better than ordinary tungsten carbide bar drawing dies.

Tungsten carbide grade selection
1. YG6 (C: 94%, Co: 6%): high wear resistance, strength and toughness are good. Hardness of not less than 89.5HRC, drawing less than ¢ 20.00mm bore non-ferrous metal rod drawing dies.
2. YG8 (WC: 92%, Co: 8%): its toughness and shock resistance higher than YG6 , but the wear resistance and hardness worse than YG6, hardness is not less than 89HRC, suitable as bars, wire drawing dies.
3. YG10: strength is 2400MPa, the hardness is not less than 88.5HRA, for the production of drawn steel and non-ferrous metal rod drawing dies.
4. YG15: strength is 2800MPa, the hardness is not less than 87HRA, drawn steel bars used to make high shrinkage of the drawing die.

Because of tungsten carbide bar drawing dies has high abrasion resistance, excellent polishing performance, and processing the material adhesion and friction coefficient of small, corrosion resistance advantages, has been widely used to draw a variety of bars instead of steel dies.

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3.Tungsten carbide Burrs
4.Tungsten Carbide Inserts
5.Tungsten Carbide Plates

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